Free Chinese AI API

Five Chinese models you can call for free through one OpenAI-compatible endpoint. 10 free-model calls a day, 5 requests per minute, no credit card, no deposit, no phone number.

Get a free API key Verify the limits

The five free models

ModelTypeContextNotes
glm-4.7-flashText202KZhipu's production flash tier, good for everyday chat and code
glm-4.1v-thinking-flashText (reasoning)128KVisible reasoning steps
glm-4.6v-flashText + vision—Send an image URL or base64 in the messages array
cogview-3-flashImage generation—Text-to-image, returns image URLs
cogvideox-flashVideo generation—Text-to-video, capped at 5 free generations/day
Free-tier limits: 10 free-model calls/day · 5 requests/min · reset at 00:00 UTC+8 · 5 free video generations/day.
Not sure you trust that? They are published in machine-readable form at /transparency.json and on /transparency.html, alongside the paid rate card at /china-ai-leaderboard.json.

Call it in one request

curl https://aiapi-pro.com/v1/chat/completions \
  -H "Authorization: Bearer $NOVAI_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"glm-4.7-flash","messages":[{"role":"user","content":"Hello"}]}'

Any OpenAI SDK works: set base_url to https://aiapi-pro.com/v1 and the model id to one of the five above. Keys start with nvai-.

What "free" means here

These are the providers' own Flash tiers served through official endpoints — not demos, and not a time-limited promotion. The free tier has a daily call cap; the models themselves are the production Flash models. There is no markup on paid usage either: the gateway passes through provider list price with a 1.0 multiplier.

When the cap is not enough

Model choice is usually where the bill comes from, so the free tier is meant to let you measure before you spend. If you hit the daily cap: a one-time top-up removes it and raises the limit to 60 requests/minute; the first top-up carries a 25% bonus. Paid Chinese models start around $0.02 per 1M tokens for the cheapest text models — the live rate card is at /china-ai-leaderboard.json.

FAQ

Is the free tier really free — no card, no deposit?

Yes. Five models are free to call: glm-4.7-flash, glm-4.6v-flash, glm-4.1v-thinking-flash, cogview-3-flash (image) and cogvideox-flash (video). You need an email account and an API key, but no credit card, deposit or phone number.

What are the limits?

10 free-model calls per day and 5 requests per minute on the free tier, resetting at 00:00 UTC+8. Free video generations are capped at 5 per day. Paid models are separate and optional.

What happens when I hit the daily limit?

Requests to free models return a 429 until the next reset. A one-time top-up removes the free-tier cap and unlocks 60 requests per minute; the first top-up also carries a 25% bonus.

Are the free models full-size models?

They are the providers' own Flash tiers, not demos: GLM-4.7-Flash and GLM-4.1V-Thinking-Flash are Zhipu's production flash models, CogView3-Flash is an image model and CogVideoX-Flash is a video model. Larger flagship models are available on the paid catalog.

Wondering whether the free tier is enough? We measured 13,807 real calls: the median call costs $0.0048, and here is what that means for a top-up.

Not sure what a model id means? Decode it here.

Setup guide: free AI coding API — Cline, Continue, Aider and Cursor configuration (base URL, key, model ids).